集成蛋白信号传递对于T细胞急性淋巴细胞白血病的骨髓介导支持至关重要
Aram Lyu1, Ryan S Humphrey1, Seo Hee Nam1
1Department of Molecular Biosciences, The University of Texas at Austin, Austin, TX, USA.
Nature communications
|October 7, 2023
概括
T细胞急性淋巴细胞白血病 (T-ALL) 细胞需要与髓质细胞密切接触才能生存. 通过FAK/PYK2传递因特格林驱动的信号对于这种髓状细胞的支持至关重要,影响白血病的进展和患者的预后.
科学领域:
- 在瘤学瘤学.
- 细胞生物学 细胞生物学
- 免疫学 免疫学 免疫学
背景情况:
- T细胞急性淋巴细胞白血病 (T-ALL) 依赖于与瘤相关的髓状细胞提供支持.
- 胰岛素样生长因子1受体 (IGF1R) 信号在T-ALL爆发中被髓状细胞激活,但仅此一点就不足以在体外生存白血病.
- 额外的骨髓系衍生信号也与T-ALL进展有关.
研究的目的:
- 对T-ALL存活和进展的骨髓介导支持机制进行调查.
- 确定涉及T-ALL细胞和髓状细胞之间的相互作用的新信号通路.
- 评估针对T-ALL.中这些相互作用的治疗潜力.
主要方法:
- 利用转录分析和体外共同培养试验来研究T-ALL和骨髓细胞相互作用.
- 研究了整合素介导的细胞粘附和下游信号通路的作用,包括焦点粘附激酶 (FAK) /富含proline的氨酸激酶2 (PYK2).
- 评估了在小鼠模型和初级患者T-ALL细胞中阻断整合素连接体或抑制FAK/PYK2信号的影响.
主要成果:
- 为了生存,T-ALL细胞需要与髓状细胞保持密切的身体接触.
- 集成蛋白介导的细胞粘附激活了FAK/PYK2信号传递,这对于骨髓介导的T-ALL支持至关重要,并部分激活了IGF1R.
- 抑制整合素介导的粘附或FAK/PYK2信号减少了体内白血病负担,并降低了初级患者T-ALL细胞的存活率.
- 升高的整合素通路基因特征与FAK/骨髓质特征相关,并预测了儿科T-ALL患者的更差预后.
结论:
- 集成蛋白激活和随后的FAK/PYK2信号传递是T-ALL进展的骨髓介导支持的关键机制.
- 针对整合因子介导的粘附和FAK/PYK2信号,代表了T-ALL.的潜在治疗策略.
- 这些发现凸显了T-ALL细胞-髓质细胞交叉在白血病发病过程中的重要性.
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